<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div
    {
      width: 300px;
      height: 100px;
      border-radius: 50px;
      background-color: #62b5ec;
      /*x轴偏移 y轴偏移 羽化值 阴影扩展半径 阴影颜色*/
      box-shadow: 5px 5px 5px 5px gray;
    }
  </style>
</head>
<body>
    <div></div>
</body>
</html>